Phase-dependent phytoavailability of thallium - A synthetic soil experiment

► A relationship between mineralogical position of Tl and plant uptake was proved. ► Soil enriched in Ksat-birnessite had the lowest potential for Tl release. ► High rate of biological uptake of Tl was observed for soil with Tl-modified illite. ► Root-induced dissolution of synthetic calcite and ferrihydrite was identified.